/Engine/Source/Runtime/Json/Public/Dom/JsonObject.h
Get the field named FieldName as an array of strings. Returns false if it doesn't exist or any member cannot be converted.
bool TryGetStringArrayField ( const [FString](API\Runtime\Core\Containers\FString) & FieldName, [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > & OutArray ) const